题目内容
计算下式,结果要表示为循环小数:(
-
)×
= .
| 2003 |
| 9900 |
| 2003 |
| 9990 |
| 3 |
| 13 |
分析:将原式通分、相加然后再约分,最后进行除法运算即可得到一个循环小数.
解答:解:原式=
×
,
=
×
,
=
×
,
=
×
,
=0.000
,
故答案为:0.000
.
| 2003×9990-2003×9900 |
| 9900×9990 |
| 3 |
| 13 |
=
| 2003×(9990-9900) |
| 9900×9990 |
| 3 |
| 13 |
=
| 2003×90 |
| 9900×9990 |
| 3 |
| 13 |
=
| 2003 |
| 9900×111 |
| 3 |
| 13 |
=0.000
| • |
| 4 |
| • |
| 2 |
| • |
| 0 |
| • |
| 6 |
| • |
| 3 |
| • |
| 0 |
故答案为:0.000
| • |
| 4 |
| • |
| 2 |
| • |
| 0 |
| • |
| 6 |
| • |
| 3 |
| • |
| 0 |
点评:此题考查了分数的通分、约分与加减运算,计算时要先通过通分来简化计算.
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